Extension methods shown with type arguments substituted in completion list

idea/testData/completion/basic/common/SubstitutedSignature3.kt

@@ -0,0 +1,5 @@
+fun foo(list: List<String>) {
+    list.<caret>
+}
+// EXIST: { itemText: "firstOrNull", tailText: "(predicate: (String) -> Boolean) for Iterable<String> in kotlin", typeText: "String?" }
+// EXIST: { itemText: "toMap", tailText: "(selector: (String) -> K) for Iterable<String> in kotlin", typeText: "Map<K, String>" }

idea/testData/completion/basic/java/ExtensionFromStandardLibrary.kt

@@ -8,5 +8,5 @@ fun firstFun() {
 }
 
 // INVOCATION_COUNT: 1
-// EXIST: { lookupString:"toLinkedList", itemText:"toLinkedList", tailText:"() for Iterable<T> in kotlin" }
+// EXIST: { lookupString:"toLinkedList", itemText:"toLinkedList", tailText:"() for Iterable<Int!> in kotlin" }
 // NUMBER: 1